PXD019674-1

PXD019674 is an original dataset announced via ProteomeXchange.

Title	Requirement of Nuclear Pore Complex subunits for transposon silencing in Drosophila
Description	The piRNA pathway is a small RNA-based immune system that silences mobile genetic elements in animal germlines. In Drosophila ovaries, piRNAs are produced from discrete genomic loci, called piRNA clusters, which are composed of inactive transposon copies and fragments and thus constitute a genetically encoded memory of past transposon challenges. Two types of piRNA clusters exist in flies: dual-strand clusters, expressed only in the germline via a highly specialised machinery, and uni-strand cluster, which are predominantly expressed in the somatic follicle cells. Flamenco (flam) is the major uni-strand piRNA cluster in Drosophila, giving rise to the majority of somatic piRNAs. Flam resembles a canonical RNA polymerase II transcriptional unit, nonetheless it can be specifically recognised by the piRNA pathway and directed to the biogenesis machinery. Recent work has implicated the RNA helicase Yb in the licensing of somatic piRNA production, however a detailed understanding of the molecular mechanisms underlying flam export and specification is still lacking. Here, we show that flam export triggers the assembly of peri-nuclear condensates of Yb and provide evidence that piRNA production from flam specifically requires subunits of the Nuclear Pore Complex (NPC). In the absence of some NPC subunits, transposons become de-silenced and piRNA biogenesis is compromised exclusively from flam. We also show that Yb transiently associates with the NPC to promote flam export. Taken together, our data shed light on how the export of uni-strand cluster transcripts is achieved and suggest the evolution of a specialised machinery that couples transcription, nuclear export and piRNA production.
HostingRepository	PRIDE
AnnounceDate	2021-07-02
AnnouncementXML	Submission_2021-07-02_02:16:57.206.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Marzia Munafo
SpeciesList	scientific name: Drosophila melanogaster (Fruit fly); NCBI TaxID: 7227;
ModificationList	No PTMs are included in the dataset
Instrument	Orbitrap Fusion Lumos

Revision	Datetime	Status	ChangeLog Entry
0	2020-06-09 06:10:29	ID requested
⏵ 1	2021-07-02 02:16:57	announced
2	2024-10-22 05:23:35	announced	2024-10-22: Updated project metadata.

Dataset with its publication pending

submitter keyword: pirna piwi npc nuclear export

Gregory J. Hannon
contact affiliation	CRUK Cambridge Institute University of Cambridge Li Ka Shing Centre Robinson Way CB2 0RE Cambridge United Kingdom
contact email	greg.hannon@cruk.cam.ac.uk
lab head
Marzia Munafo
contact affiliation	Cambridge University
contact email	marzia.munafo@cruk.cam.ac.uk
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2021/07/PXD019674

PRIDE project URI

• PRIDE
  1. PXD019674
     1. Label: PRIDE project
     2. Name: Requirement of Nuclear Pore Complex subunits for transposon silencing in Drosophila